Transmission-gearing.



K. PROBST.

TRANSMISSION GEARING. APPLIGATION FILED SEPT. 28, 1908.

968,495.- Patented Aug. 23, 1910 no -2 S 1 o 2 v w 5 G?! U l I: l/

INVENTOR. CR

. WITNESSES: M

UNITED srnras Parana onnron.

' KARL rnonsr, or COLUMBUS, oirro, Ass renon or FIFTY-ONE onn-nunnnnnrns.To

THE SEAGRAVE COMPANY, OF COLUMBUS, OHIO,

A CORPORATION OF OHIO.

TRANSMISSION-GEARIN e;

Specification of Letters Patent. Patented 23, 1910.

Application filed September 28,1908. Serial No. 455206.

To all whom it may concern: Be it'known' that I, KARL Pnonsr, a citizenof the United States, residing at Columbus, in the county of Franklinand State of Ohio, have invented certain new and'useful Improvements inTransmission-Gearing, of which the followin is a specification.

My invention refittes to improvements in transmission gearing andcomprises especially the use of a a plurality of rows of concentricteeth thereon providing therebyfor a number of speeds, .and actuatingpinionsso disposed that no pinion need be moved through .one row ofteeth to reach another row with which it is desired to mesh. It" hasbeen found that where more than two speeds are provided for, a singleactuatin pinion is f unsatisfactory, for the reason t at pinions .ingthehi of diiferent sizes are preferable for producghand the low speeds.Further, it is undesirable to slide one actuating pinion through one 'ormore'gears in order to reach the gear selected for the particularspeeddesired. 1

Inf my. improvements hereinafter described, I contemplateespecially theuse of two driving pinions adapted to be operated selectively, one ofsaid pinions being mounted to mesh with the mediate speed gears, and tolie neutrally between the same, and a second pinion mounted on the samethrou h one which it shaft adapted to mesh with the low speed gear andalso to actuate the reverse gear. I attain by this construction theadvantage of having a relatively large pinion for thehigh andintermediate speeds which is not. required to be moved ear to reachanother, but is move le at will from its neutral position into mesh witheitherof the said hlgh'and intermediate speed gears. The. pini5n adaptedto drive the low speed gearjisalso constructed to Essentially thereforemy construction pro vides for the use of two pinions adapted to beselectivel operated. and which are mounted on th I thatvit is notrequired to slide a through a gear iniorder to reach is desired toactuate. 4

These improvements render possible a compact and desirable constructionand arpinion the gear rangment of parts.

In the drawings which are hereto atcrown gear plate having high andinterreach of the operator.

actuate the reverse pinionf -meshes with the gear struction is mountedin an a e same shaft, and so arranged gear 20; to

tached and hereby made a part of this speci fication, the figure shows aface view of the gears with the actuating parts partly in section. C j 7In the drawings in which the same nuinclosedby a casing, one member orwhich is shown, which is adapted to'be secured to a similar casingmember by bolts inserted through the openings 6 in a well, known manner;the continuation of the casing in section is shown at 7 and 8, it beingunderstood that these casing members are preferably mountedappropriately upon the vehicle. or other structure which is adapted tobe actuated. The driving shaft 9"is mounted in appropriate bearings 10and 11, and has mounted thereon the sleeve or tube'member 12 carryingat'its innerend the pinion 13;

the tube or sleeve 12'is adapted to'be positioned by the shaft lever letmounted upon thetube 15 which is adapted to be actuated by a lever inthe usual manner within easy The rod 16' is positioned in the tube 1 5and is also adapted to be actuated by the said lever, and .carries atits inner end the forked shifting lever 16 for positioning the pinion 17as desired by simply moving the latter along the shaft 9 either inwardlyor, outwardly.

. The reverse pinion 18 is mounted on the stub shaft 19 and actuatedthrough the gear 20, which is adapted to be driven by the pinion 13.It-is seen that the reversepinionlS 4:. The reverse coning 21 whichisappropriately mounted upon the vehicle or structure in connection withwhich the transmission caring is used.

The operation is as follows: Normally, the pinion 17 ispositionedbetween the concentric gears 2 and 3, and the pinion 13 is positioned.between the gear 4 and the reverse plperate the .high lever contro ingthe shifting ever-'16 is actuated, whereby the pinion meral indicatesthe same part throughout, 1 v is-the axle or shaft e5- gearsare-preferably machine ppropriate cas'- 68d r, th v 17 is moved into &.

tion. To drive at low speed, the operatormoves the said lever to actuatethe tube 15,

mesh with the high speed gear 2. To drive at the intermediate speed thepinion 17 will .be withdrawn and meshedwith gear 3, it being the purposeto move the pinion 17 into its operating position without requiring itto pass through one gear to reach another, which is'found to be apreferred COIISLL'LLC- which, through the forked lever 1st, will movethe sleeve 12 carrying the pinion13 I into mesh with the gear 4, and thedriving will thereupon take place at a low speed; to drive in thereverse dire.ction, the pinion 3 is withdrawn from gear 4 and meshedwith gear 20, which thereupon actuates the reverse pinion 18, which isin mesh with gear 41, whereupon the drivmg 1n the reverse chrectiontakes place through the low' speed inasmuch as it is possible to use myarrangement of shafts and pinions with teeth formed in other ways.

What I claim-is:

1. A transmission gearing comprising a plurality of concentric gears, adriving shaft, a pinion slidably mounted thereon between two of saidgears and adapted to be moved forwardly or rearwardly to enmeshtherewith as desired, a second slidable pinion mounted on said shaftadapted to actuate another of said gears from one of its posiesired to0perate; I employ tions, and reverse gearing adapted to be actuated bysaid second pinion when the latter has been shifted to another position.

- 2. In a transmission gearing, a plurality of concentric gears adaptedto produce high,

intermediate, and'low, speeds, reverse gearto mesh with said low speed Igear, a driving ing. adapted shaft, a pinion thereon positioned normallybetween the high and the intermediate speed gears and adapted to bebrought into mesh witheither at will, a sec- .ond pinion on said'shaftadapted to actuate the low speed gear and the reverse gearingselectively at will. a

. 3. A transmission gearing comprising con-.

centric gears adapted to produce high, intermediate, and low speedsrespectively, a driving shaft, a stub shaft, a reverse'gear and pinionmounted thereon, said pinion being adapted to mesh with the said lowspeed gear, a pinion on said driving shaft posi tioned normally betweensaid high and intermediate speed gears and adapted to mesh with eitherat will, a second pinion on said driving shaft positioned normallybetween said low speed gear and said reverse gear and adapted topinions.

1. In a transmission gearing a plurality of concentric gears adapted toproduce high,

intermediate, and low speeds respectively, a

driving shaft, a slidable pinion thereon normally positioned between twoof said gears and adapted to be brought into mesh with either at will,and a second be brought into .mesh with either at will, and means forcontrolling said slidable pinion on said shaft adapted to be broughtinto mesh with the, remaining gear. H w

In testimony whereof I affix my signature in the presence of twowitnesses.

KARL Pnonsr.

Witnesses GEO. W. Rlerrrumn, ROYBRENHOLTS.

